/* eslint-disable */
// @ts-nocheck
import { saveAs } from "file-saver";
import * as XLSX from "xlsx";

function generateArray(table) {
	var out = [];
	var rows = table.querySelectorAll("tr");
	var ranges = [];
	for (var R = 0; R < rows.length; ++R) {
		var outRow = [];
		var row = rows[R];
		var columns = row.querySelectorAll("td");
		for (var C = 0; C < columns.length; ++C) {
			var cell = columns[C];
			var colspan = cell.getAttribute("colspan");
			var rowspan = cell.getAttribute("rowspan");
			var cellValue = cell.innerText;
			if (cellValue !== "" && cellValue == +cellValue) cellValue = +cellValue;

			//Skip ranges
			ranges.forEach(function (range) {
				if (
					R >= range.s.r &&
					R <= range.e.r &&
					outRow.length >= range.s.c &&
					outRow.length <= range.e.c
				) {
					for (var i = 0; i <= range.e.c - range.s.c; ++i) outRow.push(null);
				}
			});

			//Handle Row Span
			if (rowspan || colspan) {
				rowspan = rowspan || 1;
				colspan = colspan || 1;
				ranges.push({
					s: {
						r: R,
						c: outRow.length
					},
					e: {
						r: R + rowspan - 1,
						c: outRow.length + colspan - 1
					}
				});
			}

			//Handle Value
			outRow.push(cellValue !== "" ? cellValue : null);

			//Handle Colspan
			if (colspan) for (var k = 0; k < colspan - 1; ++k) outRow.push(null);
		}
		out.push(outRow);
	}
	return [out, ranges];
}

function datenum(v, date1904) {
	if (date1904) v += 1462;
	var epoch = Date.parse(v);
	return (epoch - new Date(Date.UTC(1899, 11, 30))) / (24 * 60 * 60 * 1000);
}

function sheet_from_array_of_arrays(data, opts) {
	var ws = {};
	var range = {
		s: {
			c: 10000000,
			r: 10000000
		},
		e: {
			c: 0,
			r: 0
		}
	};
	for (var R = 0; R != data.length; ++R) {
		for (var C = 0; C != data[R].length; ++C) {
			if (range.s.r > R) range.s.r = R;
			if (range.s.c > C) range.s.c = C;
			if (range.e.r < R) range.e.r = R;
			if (range.e.c < C) range.e.c = C;
			var cell = {
				v: data[R][C]
			};
			if (cell.v == null) continue;
			var cell_ref = XLSX.utils.encode_cell({
				c: C,
				r: R
			});

			// 修改这里：无论原始类型是什么，都将单元格类型设置为 "s"
			cell.t = "s";

			ws[cell_ref] = cell;
		}
	}
	if (range.s.c < 10000000) ws["!ref"] = XLSX.utils.encode_range(range);
	return ws;
}

function Workbook() {
	if (!(this instanceof Workbook)) return new Workbook();
	this.SheetNames = [];
	this.Sheets = {};
}

function s2ab(s) {
	var buf = new ArrayBuffer(s.length);
	var view = new Uint8Array(buf);
	for (var i = 0; i != s.length; ++i) view[i] = s.charCodeAt(i) & 0xff;
	return buf;
}

export function export_table_to_excel(id) {
	var theTable = document.getElementById(id);
	var oo = generateArray(theTable);
	var ranges = oo[1];

	/* original data */
	var data = oo[0];
	var ws_name = "SheetJS";

	var wb = new Workbook(),
		ws = sheet_from_array_of_arrays(data);

	/* add ranges to worksheet */
	// ws['!cols'] = ['apple', 'banan'];
	ws["!merges"] = ranges;

	/* add worksheet to workbook */
	wb.SheetNames.push(ws_name);
	wb.Sheets[ws_name] = ws;

	var wbout = XLSX.write(wb, {
		bookType: "xlsx",
		bookSST: false,
		type: "binary"
	});

	saveAs(
		new Blob([s2ab(wbout)], {
			type: "application/octet-stream"
		}),
		"test.xlsx"
	);
}

export function export_json_to_excel({
	multiHeader = [],
	header,
	data,
	filename,
	merges = [],
	autoWidth = true,
	bookType = "xlsx"
} = {}) {
	/* original data */
	filename = filename || "excel-list";
	data = [...data];
	data.unshift(header);

	for (let i = multiHeader.length - 1; i > -1; i--) {
		data.unshift(multiHeader[i]);
	}

	var ws_name = "SheetJS";
	var wb = new Workbook(),
		ws = sheet_from_array_of_arrays(data);

	if (merges.length > 0) {
		if (!ws["!merges"]) ws["!merges"] = [];
		merges.forEach((item) => {
			ws["!merges"].push(XLSX.utils.decode_range(item));
		});
	}

	if (autoWidth) {
		/*设置worksheet每列的最大宽度*/
		const colWidth = data.map((row) =>
			row.map((val) => {
				/*先判断是否为null/undefined*/
				if (val == null) {
					return {
						wch: 10
					};
				} else if (val.toString().charCodeAt(0) > 255) {
					/*再判断是否为中文*/
					return {
						wch: val.toString().length * 2
					};
				} else {
					return {
						wch: val.toString().length
					};
				}
			})
		);
		/*以第一行为初始值*/
		let result = colWidth[0];
		for (let i = 1; i < colWidth.length; i++) {
			for (let j = 0; j < colWidth[i].length; j++) {
				if (result[j]["wch"] < colWidth[i][j]["wch"]) {
					result[j]["wch"] = colWidth[i][j]["wch"];
				}
			}
		}
		ws["!cols"] = result;
	}

	/* add worksheet to workbook */
	wb.SheetNames.push(ws_name);
	wb.Sheets[ws_name] = ws;

	var wbout = XLSX.write(wb, {
		bookType: bookType,
		bookSST: false,
		type: "binary"
	});
	saveAs(
		new Blob([s2ab(wbout)], {
			type: "application/octet-stream"
		}),
		`${filename}.${bookType}`
	);
}
